Oswaldofilaria spp. (Filarioidea, Nematoda) in Australian agamid lizards with a description of a new species and a redescription of O. chlamydosauri (Breinl).

Oswaldofilaria samfordensis n.sp. is described from Physignathus lesueurii and a redescription of O. chlamydosauri (Breinl, 1913) from Chlamydosaurus kingii and Amphibolurus barbatus is given. O. pflugfelderi (Frank, 1964) is confirmed as a valid species. A key is added to separate the four Australian species in the genus. Gonocephalus boydii was recorded as a new host for O innisfailensis (Mackerras, 1962). A survey involving fifty specimens of P. lesueurii from South Queensland revealed that multiple infections with different filarioids are common and can include up to three different species in one individual animal. Pseudothamugadia physignathi (Johnston, 1912) (Splendidofilariinae) was the filarioid most frequently found, followed by O. Samfordensis and O. pflugfelderi